Molecular dynamics study on nano-sized wiredrawing: possible atomistic process and application to pearlitic steel wire

International Conference on Mechanical Engineering and Applied Composite Materials

机械制造;材料科学

Saitoh, K.^1 ; Yoshida, K.^1 ; Oda, K.^1 ; Sato, T.^1 ; Takuma, M.^1 ; Takahashi, Y.^1

Department of Mechanical Engineering, Faculty of Engineering Science, Kansai University, 3-3-35 Yamate-cho, Suita, Osaka

564-8680, Japan^1

关键词: Atomistic process;    Atomistic simulations;    Cementite decomposition;    Cementite interface;    Computation model;    Interatomic potential;    Lubrication mechanism;    Molecular dynamics simulations;   

Others  :  https://iopscience.iop.org/article/10.1088/1757-899X/307/1/012039/pdf
DOI  :  10.1088/1757-899X/307/1/012039

学科分类：材料科学（综合）

来源: IOP

【 摘 要 】

The process of nano-sized wiredrawing is investigated by using molecular dynamics (MD) simulation in this study. The authors have constructed novel computation models of wiredrawing, in which a single wire of just a several nanometers in diameter is smoothly drawn through a perfectly rigid die together with lubrication mechanism and is forced to be shaped into thinner one. Interatomic potentials used in MD simulation is a conventional pairwise type useable for iron-carbon binary system (for pearlitic steel). For MD model of pearlite steel wire, it is recognized that ferrite-cementite interface effectively offers high-speed diffusion path for carbon atoms from cementite side to ferrite side (elementary mechanism of cementite decomposition). As conclusion, we showed by using atomistic simulation that nano-sized wiredrawing process is theoretically quite possible.